Golang Logger.Errorf函数代码示例

// 获取当前登录用户信息（常用信息）
func FindCurrentUser(username string) (user map[string]interface{}, err error) {
	userLogin := model.NewUserLogin()
	err = userLogin.Where("username=" + username).Find()
	if err != nil {
		logger.Errorf("获取用户 %s 信息失败：%s", username, err)
		return
	}
	if userLogin.Uid == 0 {
		logger.Infof("用户 %s 不存在！", username)
		return
	}
	user = map[string]interface{}{
		"uid":      userLogin.Uid,
		"username": userLogin.Username,
		"email":    userLogin.Email,
	}

	// 获取未读消息数
	user["msgnum"] = FindNotReadMsgNum(userLogin.Uid)

	// 获取角色信息
	userRoleList, err := model.NewUserRole().Where("uid=" + strconv.Itoa(userLogin.Uid)).FindAll()
	if err != nil {
		logger.Errorf("获取用户 %s 角色 信息失败：%s", username, err)
		return
	}
	for _, userRole := range userRoleList {
		if userRole.Roleid <= model.AdminMinRoleId {
			// 是管理员
			user["isadmin"] = true
		}
	}
	return
}

// 通过唯一键（uid或username）获取用户信息
func findUserByUniq(field, val string) *model.User {
	user := model.NewUser()
	err := user.Where(field + "=" + val).Find()
	if err != nil {
		logger.Errorf("获取用户 %s 信息失败：%s", val, err)
		return nil
	}
	if user.Uid == 0 {
		return nil
	}

	// 获取用户角色信息
	userRoleList, err := model.NewUserRole().
		Order("roleid ASC").Where("uid="+strconv.Itoa(user.Uid)).FindAll("uid", "roleid")
	if err != nil {
		logger.Errorf("获取用户 %s 角色 信息失败：%s", val, err)
		return nil
	}

	if roleNum := len(userRoleList); roleNum > 0 {
		user.Roleids = make([]int, roleNum)
		user.Rolenames = make([]string, roleNum)

		for i, userRole := range userRoleList {
			user.Roleids[i] = userRole.Roleid
			user.Rolenames[i] = Roles[userRole.Roleid-1].Name
		}
	}

	return user
}

// 获取单个用户信息
func FindUserByUsername(username string) *model.User {
	user := model.NewUser()
	err := user.Where("username=" + username).Find()
	if err != nil {
		logger.Errorf("获取用户 %s 信息失败：%s", username, err)
		return nil
	}
	if user.Uid == 0 {
		return nil
	}

	// 获取角色信息
	userRoleList, err := model.NewUserRole().Where("uid=" + strconv.Itoa(user.Uid)).FindAll()
	if err != nil {
		logger.Errorf("获取用户 %s 角色 信息失败：%s", username, err)
		return nil
	}
	for _, userRole := range userRoleList {
		if len(user.Roleids) == 0 {
			user.Rolenames = []string{model.AllRole[userRole.Roleid].Name}
		} else {
			user.Rolenames = append(user.Rolenames, model.AllRole[userRole.Roleid].Name)
		}
	}
	return user
}

// 在逻辑处理完之后，最后展示页面
func (this *ViewFilter) PostFilter(rw http.ResponseWriter, req *http.Request) bool {
	contentHtml := req.FormValue(CONTENT_TPL_KEY)
	if contentHtml == "" {
		return true
	}
	contentHtmls := strings.Split(contentHtml, ",")
	for i, contentHtml := range contentHtmls {
		contentHtmls[i] = config.ROOT + strings.TrimSpace(contentHtml)
	}

	// 为了使用自定义的模板函数，首先New一个以第一个模板文件名为模板名。
	// 这样，在ParseFiles时，新返回的*Template便还是原来的模板实例
	tpl, err := template.New(this.baseTplName).Funcs(funcMap).ParseFiles(append(this.commonHtmlFiles, contentHtmls...)...)
	if err != nil {
		logger.Errorf("解析模板出错（ParseFiles）：[%q] %s\n", req.RequestURI, err)
		return false
	}
	// 如果没有定义css和js模板，则定义之
	if jsTpl := tpl.Lookup("js"); jsTpl == nil {
		tpl.Parse(`{{define "js"}}{{end}}`)
	}
	if jsTpl := tpl.Lookup("css"); jsTpl == nil {
		tpl.Parse(`{{define "css"}}{{end}}`)
	}

	data := GetData(req)

	err = tpl.Execute(rw, data)
	if err != nil {
		logger.Errorf("执行模板出错（Execute）：[%q] %s\n", req.RequestURI, err)
	}
	return true
}

func (w *Huobi) getOrderBook(symbol string) (ret bool, hbOrderBook OrderBook) {
	// init to false
	ret = false
	var huobisymbol string
	if symbol == "btc_cny" {
		huobisymbol = "huobibtccny"
	} else {
		huobisymbol = "huobiltccny"
		logger.Fatal("huobi does not support LTC by now, wait for huobi provide it.", huobisymbol)
		return
	}

	rnd := util.RandomString(20)

	now := time.Now().UnixNano() / 1000000

	req, err := http.NewRequest("GET", fmt.Sprintf(Config["hb_trade_detail"], rnd, now, now), nil)
	if err != nil {
		logger.Fatal(err)
		return
	}

	req.Header.Set("Referer", Config["base_url"])
	req.Header.Add("Connection", "keep-alive")
	req.Header.Add("User-Agent", "Mozilla/5.0 (Windows NT 5.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/31.0.1650.63 Safari/537.36")
	req.Header.Add("Accept-Encoding", "identity")

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		logger.Traceln(err)
		logger.Traceln(req)
		logger.Traceln(resp)
		return
	}
	defer resp.Body.Close()

	if resp.StatusCode != 200 {
		logger.Errorf("HTTP returned status %v", resp)
		return
	}

	var body string
	contentEncoding := resp.Header.Get("Content-Encoding")
	logger.Tracef("HTTP returned Content-Encoding %s", contentEncoding)
	switch contentEncoding {
	case "gzip":
		body = util.DumpGZIP(resp.Body)
	default:
		bodyByte, err := ioutil.ReadAll(resp.Body)
		if err != nil {
			logger.Errorln("read the http stream failed")
			return
		} else {
			body = string(bodyByte)
			ioutil.WriteFile("cache/OrderBook.json", bodyByte, 0644)
		}
	}

	return w.analyzeOrderBook(body)
}

//entry call
func Tick(tradeAPI TradeAPI, records []Record) bool {

	strategyName := Option["strategy"]
	strategy, ok := strategys[strategyName]
	if !ok {
		logger.Errorf("sql: unknown strategy %q (forgotten import? private strategy?)", strategyName)
		return false
	}

	// length := len(records)
	// //
	// if length == 0 {
	// 	logger.Errorln("warning:detect exception data", len(records))
	// 	return false
	// }

	// //check exception data in trade center
	// if checkException(records[length-2], records[length-1]) == false {
	// 	logger.Errorln("detect exception data of trade center",
	// 		records[length-2].Close, records[length-1].Close, records[length-1].Volumn)
	// 	return false
	// }

	gTradeAPI = tradeAPI
	return strategy.Tick(records)
}

// 登录；成功返回用户登录信息(user_login)
func Login(username, passwd string) (*model.UserLogin, error) {
	userLogin := model.NewUserLogin()
	err := userLogin.Where("username=" + username + " OR email=" + username).Find()
	if err != nil {
		logger.Errorf("用户 %s 登录错误：%s", username, err)
		return nil, errors.New("内部错误，请稍后再试！")
	}
	// 校验用户
	if userLogin.Uid == 0 {
		logger.Infof("用户名 %s 不存在", username)
		return nil, ErrUsername
	}
	passcode := userLogin.GetPasscode()
	md5Passwd := util.Md5(passwd + passcode)
	logger.Debugf("passwd: %s, passcode: %s, md5passwd: %s, dbpasswd: %s", passwd, passcode, md5Passwd, userLogin.Passwd)
	if md5Passwd != userLogin.Passwd {
		logger.Infof("用户名 %s 填写的密码错误", username)
		return nil, ErrPasswd
	}

	// 登录，活跃度+1
	go IncUserWeight("uid="+strconv.Itoa(userLogin.Uid), 1)

	return userLogin, nil
}

// 记录用户最后登录时间
func RecordLoginTime(username string) error {
	userLogin := model.NewUserLogin()
	err := userLogin.Set("login_time=" + time.Now().Format("2006-01-02 15:04:05")).Where("username=" + username).Update()
	if err != nil {
		logger.Errorf("记录用户 %s 登录时间错误：%s", username, err)
	}
	return err
}

// 获取单个 Topic 信息（用于编辑）
func FindTopic(tid string) *model.Topic {
	topic := model.NewTopic()
	err := topic.Where("tid=?", tid).Find()
	if err != nil {
		logger.Errorf("FindTopic [%s] error：%s\n", tid, err)
	}

	return topic
}

// 获取单个 Resource 信息（用于编辑）
func FindResourceById(id string) *model.Resource {
	resource := model.NewResource()
	err := resource.Where("id=?", id).Find()
	if err != nil {
		logger.Errorf("FindResourceById [%s] error：%s\n", id, err)
	}

	return resource
}

func main() {
	// Metron is intended to be light-weight so we occupy only one core
	runtime.GOMAXPROCS(1)

	flag.Parse()
	config, err := config.ParseConfig(*configFilePath)
	if err != nil {
		panic(fmt.Errorf("Unable to parse config: %s", err))
	}

	logger := logger.NewLogger(*debug, *logFilePath, "metron", config.Syslog)

	statsStopChan := make(chan struct{})
	batcher, eventWriter := initializeMetrics(config, statsStopChan, logger)

	go func() {
		err := http.ListenAndServe(net.JoinHostPort("localhost", pprofPort), nil)
		if err != nil {
			logger.Errorf("Error starting pprof server: %s", err.Error())
		}
	}()

	logger.Info("Startup: Setting up the Metron agent")
	marshaller, err := initializeDopplerPool(config, batcher, logger)
	if err != nil {
		panic(fmt.Errorf("Could not initialize doppler connection pool: %s", err))
	}

	messageTagger := tagger.New(config.Deployment, config.Job, config.Index, marshaller)
	aggregator := messageaggregator.New(messageTagger, logger)
	eventWriter.SetWriter(aggregator)

	dropsondeUnmarshaller := eventunmarshaller.New(aggregator, batcher, logger)
	metronAddress := fmt.Sprintf("127.0.0.1:%d", config.IncomingUDPPort)
	dropsondeReader, err := networkreader.New(metronAddress, "dropsondeAgentListener", dropsondeUnmarshaller, logger)
	if err != nil {
		panic(fmt.Errorf("Failed to listen on %s: %s", metronAddress, err))
	}

	logger.Info("metron started")
	go dropsondeReader.Start()

	dumpChan := signalmanager.RegisterGoRoutineDumpSignalChannel()
	killChan := signalmanager.RegisterKillSignalChannel()

	for {
		select {
		case <-dumpChan:
			signalmanager.DumpGoRoutine()
		case <-killChan:
			logger.Info("Shutting down")
			close(statsStopChan)
			return
		}
	}
}

func ModifyComment(cid, content string) (errMsg string, err error) {
	err = model.NewComment().Set("content=?", content).Where("cid=" + cid).Update()
	if err != nil {
		logger.Errorf("更新评论内容 【%s】 失败：%s\n", cid, err)
		errMsg = "对不起，服务器内部错误，请稍后再试！"
		return
	}

	return
}

// UpdateUserStatus 更新用户状态
func UpdateUserStatus(uid, status int) {
	setClause := "status=" + strconv.Itoa(status)
	err := model.NewUser().Set(setClause).Where("uid=?", uid).Update()
	if err != nil {
		logger.Errorf("更新用户 【%s】 状态失败：%s", uid, err)
		return
	}

	return
}

// 更新用户密码（用户名或email）
func UpdatePasswd(username, passwd string) (string, error) {
	userLogin := model.NewUserLogin()
	passwd = userLogin.GenMd5Passwd(passwd)
	err := userLogin.Set("passwd=" + passwd + ",passcode=" + userLogin.GetPasscode()).Where("username=" + username + " OR email=" + username).Update()
	if err != nil {
		logger.Errorf("用户 %s 更新密码错误：%s", username, err)
		return "对不起，内部服务错误！", err
	}
	return "", nil
}

func RunCreateVm(ctx context.Context, vmDeviceId uint) error {
	repo, ok := middleware.RepoFromContext(ctx)
	if !ok {
		return errors.New("内部服务器错误")
	}

	logger, ok := middleware.LoggerFromContext(ctx)
	if !ok {
		return errors.New("内部服务器错误")
	}

	vmDevice, err := repo.GetVmDeviceById(vmDeviceId)
	if err != nil {
		return err
	}

	device, err := repo.GetDeviceById(vmDevice.DeviceID)
	if err != nil {
		return err
	}

	var cmdFormat = `LANG=C virt-install --connect qemu+ssh://[email protected]%s/system \
--name=%s \
--os-type=windows \
--vcpus=%d \
--ram=%d \
--hvm \
--boot hd,network,menu=on \
--accelerate \
--graphics vnc,listen=0.0.0.0,port=%s \
--noautoconsole \
--autostart \
--network bridge=br0,model=virtio,mac=%s \
--disk path=/dev/VolGroup0/%s,device=disk,bus=virtio,cache=none,sparse=false,format=raw`
	var cmd = fmt.Sprintf(cmdFormat,
		device.Ip,
		vmDevice.Hostname,
		vmDevice.CpuCoresNumber,
		vmDevice.MemoryCurrent,
		vmDevice.VncPort,
		vmDevice.Mac,
		vmDevice.Hostname)
	logger.Debugf("create vm:%s", cmd)
	var runResult = "执行脚本:\n" + cmd
	bytes, err := util.ExecScript(cmd)
	logger.Debugf("create result:%s", string(bytes))
	runResult += "\n\n" + "执行结果:\n" + string(bytes)
	if err != nil {
		logger.Errorf("create error:%s", err.Error())
		runResult += "\n\n" + "错误信息:\n" + err.Error()
		return errors.New(runResult)
	}
	return nil
}